Sirup pump



3, 1953 M. E. STECZYNSKI Er AL 2,657,833

SIRUP PUMP Filed April 28, 1949 2 Sheets-Sheet l A w L@ is y 77////// m e I I H g Nov. 3, 1953 M. E. STECZYNSKI El AL 2,657,333

SIRUP PUMP 2 Sheets-Sheet 2 Filed April 28, 1949 vdllll; v

Patented Nov. 3, 1953 235 57333 s'nwr PUMP :8 fitemnski, We! Ear -V. fiupn, phi cago, ;-Ill. assignors to e ess g C umns Biederat dtend i This invention relates :genemlly to pumps and more particularly .-to an improved isyrup pump for Iuse-i-n so da. :founta'ins.

In soda fountains the 'various flavored syrups used in making soft drinks, sodas and sundaes in ceramic receptacles or jars ities or hollows.

Another object is @to provide 'a positive action A further e object ;is to provide an improved :volume adjustment arrangement position of the .operating "handles thereby aimproving the appearanoeof the fountain, and the .attendan s fi afi fi aslanee whengaz andl l ome-t v es landii rsad r o as r 91 syrups are being whereby :the vol-v ume may "be varied without altering @the informal y 'alplate 123 2 .to itsstartin position, and provision bein made w any syrup adherin i t x ishh hood of the dis har openin om ri p n a-therefr'om.

Other and Fig. .4 is anvenlarged section showingthe positions of (the pump elements iduring the return stroke;

E'ig. 5 is -a ghorizontalrsection taken on 1line;55 ofi'Eig. 3;

Fig. -6 is an enlarged wiew ,showing the bayonet lock arrangement by which the pump cylinder is removablysunported ,on a .head .plate; and

ifilig. is ;a section taken on line y'l lof 'Fig. 1.

in :the vertical position in the vally, however, the jar fl?! is mounted on an angle to the vertical as the '?liquid surface indicated by the work side of theifountain,

The elements 10f -:the pump All .are supported which, .in addition to serving as a mounting plate, also is a removable covernfor the serves as the sole support for the cup assembly l8 in the preferred embodiment.

This assembly 18 comprises a circular head or plate 28 which is brazed to the tube IS. The periphery of the plate 20 is provided with three projections 2|, as shown in Figs. and 6, which serve to support the cylindrical cup 22. The cup 22 is provided with a bayonet slot 23 corresponding to each of the projections 21 (Figs. 5 and 6) and is attached to the plate by slipping the projections 2| into the slots 23 and turning the cup a few degrees to lock same in position.

The inside wall of the cup 22 is cylindrical and smooth, for it cooperates with the movable piston 23 which is attached to the end of a rod 23 extending upwardly to the handle 21. The rod passes through an opening 28 in the plate and, when the handle 21 is moved, its motion is transmitted through the rod to the piston as shown in Figs. 1, 3 and 4.

The discharge tube 13 extends through the plate 20 to a position near the bottom of the cup 22, an opening 33 being provided in the piston 23 for the tube 13. The lower end of this tube receives a check valve assembly 32 containing a ball check 33. The assembly 32 is supported in the tube 15 solely by friction and the slight outward pressure of the ball retaining prongs 34 against the wall of the tube 13. Thus, assembly 32 may be readily removed from the end of the tube I3 simply by grasping its lower end between the fingers and pulling downwardly thereon. The bottom portion of the assembly 32 is disclike in shape and preferably integrally formed with the ball retaining prongs 34. 33 is provided at the center thereof, and the ball 33 seals this port when in the position shown in Fig. 4. The upper ends of the ball retaining prongs 34 are turned in so as to provide sufiicient clearance for the free flow of liquid and yet retain the ball 33. The prongs 34 are made of sufflcient length to permit cleaning between the movable, it is extremely simple to clean. removal the attendant submerges the assembly in water and passes a brush back and forth between the prongs 34 to clean them. Next, he reverses the assembly 32, permitting the ball 33 to move to the opposite end and passes the brush through the opening 33 and between the prongs r 34 to thoroughly clean the port 31.

To facilitate cleaning it is preferred that the valve 32 be made in one piece with generous fillets between the ball retaining prongs 34 and the bottom portion 35 eliminating sharp interior corners. The assembly 32 is preferably machined from rod stock, the upper ends of the prongs 34 being left straight until the ball 33 is dropped into place. After this the ends of the prongs 34 are bent inwardly to retain the ball 33 and the prongs proper 34 are sprung slightly outwardly so as to normally diverge and exert a pressure against the sides of the tube 13 when installed therein.

The bottom of the cup 22 is provided with a relatively large inlet port 31 which permits syrup to enter during the return stroke of the piston 23 without developing any substantial back pressure upon the valve 33 that might dislodge the assembly 32. To seal this port during the pumping stroke, a check valve 38 is provided. The valve 38 is supported in a guide or retainer 40 which rests on the bottom of the cup 22. The guide A round port 1 a side by side. -in a line the appearance is spoiled and the attended primarily receive a spring and with its center portion raised to provide the necessary lift of the valve.

retainer can be made of a flat strip of metal formed to provide the desired contour indicated a short stem 4| having a flat disc 42 brazed thereto. The stem 4| rides in an opening 4 the guide 43 and thus retains the valve 38 in place, downward movement being limited by the bottom of the cup 22.

A helical return spring 44 is disposed within the cup 22 close to the cylindrical side thereof, and bears against both the piston 25 and the top of the valve guide 43, serving the dual function of providing force for the return stroke of the piston 25 and also holding the valve guide 40 in position against the bottom of the cup 22.

The upper end of the rod 23 is threaded as indicated at 45 so that the stroke of the piston 23 may be varied to change the amount of syrup delivered. Upward movement of the piston 23 is limited by the plate 20. Downward movement, however, is limited by a stop member 43 and a sleeve 41 which is supported on the mounting plate l3. When the handle 21 is pushed all the way down, a shoulder 48 on the bottom of the member 43 comes to rest against the top of the sleeve 41, thereby preventing further downward travel of the piston 25 and limiting the stroke thereof. A threaded collar 58 is provided which centers the shaft 23 in the sleeve 41 and also serves as a lock nut for the member 43.

To adjust the height of the shoulder 48 with respect to the rod 23 the collar 33 is screwed downwardly to free the member 43 which is then screwed to the desired vertical position corresponding to the volume of syrup to be pumped. The collar 53 is then screwed up tight against the stop 48 to lock it in that position.

The handle 21 may be integral with the member 48 but is preferably separate therefrom being threaded internally and screwed onto the shaft 23. Thus, the vertical position of the handle 21 is independent of the adjustment of the stop 43. The particular advantage of this feature is apparent when it is remembered that the jars II in soda fountains are mounted in horizontal rows If the tops of the handles are not tendants job is made harder, for he is never sure that a handle is not stuck part way down or that he has pumped a full measure.

The handle assembly iila of the modified embodiment shown in Fig. 2 differs from that described above in that a lever 52 is provided in order to increase the force which may be applied on the rod 23, the pump Illa being infor more viscous syrups. Otherwise, the two embodiments are substantially the same.

The lever 52 is pivoted about a bolt 53 supported on an arm 54 formed integrally with the sleeve 41a. A stop member 43a and a collar 30a -are provided and function in the same manner s as their counterparts in the preferred embodiment to control the length of the pumping stroke and hence the volume of liquid dispensed with each stroke, and to center the rod 23a.

Above the stop member 43a an element 55 is threadably attached to the top of the rod 230 and is adjustable vertically with respect thereto. The top of this element is flat and cooperates with a roller 53 journalled on the lever 52, the roller 53 hearing against the flat surface to 40 is preferably made with its ends shaped to exert a downward force on the rod 23a as the the "point or iustment at the same position regardless of stroke adjustnqent. As the stroke reduced the adjustment B5 is withdrawn "to retain the position of the lever.

ectuat'orrod 26a from thedischargepipe f6 and is preferably brazed to both of the plates "I3 anfd'il. "This reiniorc'i'ng rod i's'alsouse'd in the embodiment of Fig. 1 to provide additional reinforcemeni.

The discharge tubes 16 in both embodiments are identical and fas not to'drip and to be easy to clean. It will b'e'not'edthat the tube f6 consists of two straight portions onnected by a rather sharply curved portion. This permits a brush to be inserted 'frofn either end to clean the whole tube 1'6. The arrangement whereby "the "check valve assembly 32 may be pulled out of the lower end of tube l6 has already been described. -The end oi the tribe ffliis also constructed so that iteen be completely disassembled for 'c'leam *ih'g'. is accomplished by fashioning a disthe plug 6|. 7

The plug $1 is preferabl-y tapered "from a point elosely"proximatetothe rear side of the open- "ing STtoapdiflt projeting beyond the opposite oftfheoperfingwso as to define a. "decreasing 'an'nular "passage "leading to the thetaper 'a'nd fall-hackdown the tube T6 instead "of out the opening "5 "taper is easyto form and donations correctly rotary *ehanged position when ih plah'e.

"in order-to make "the rap st "easy to "clean and to make sure that the plug 6'|"wil1"not be left out and the-cap "arone'u'sed COT'Bal thetub'e l6,

"an opening ss throug'hthe end "of the cap "60 provided. Were "it: possible to use the cap 60 I would the pump be likely to drip; but"a."sl'iarp"chrner which would be very hard to clean wouldresult.

The pumps of ithi's invention operate in "the 'i'olldwiiig' manner e'ahh tihie the handle 21 on "the preferred embodiment -or the lever 52 011 the modified embodim'ent :is (actuated:

Before the handle 4:1 :is :movedethe various elements occupy the positions shown inFig. :1. whee-piston 25 is at the -tp of the cup -22 .acl- .p1ate-20,, and-the cup 22 is filled with syrup the valves .32 and 38 being closed.

piston 25, whose upper 6 As the handle 211s moved d wnwardly the force of the spring 44 the ball check valve 32 opens, as shown in Fig. '3

is -moved is delivered during the downward stroke of the piston 25.

When the pumping stroke has beencompleted and the pressure on the handle 2 is removed the spring 44 forces the piston 25 upwardly. As shown in Fig. 4, the valve38 opens allowing syrup to how into the cup and the ball check valve 32 closes, preventing the back flow of syrup from the tube It.

Attention is directed to the fact that there relationship between 'the bell the ointed does not close starts to move "from the dischargewpening' sl.

At the completion =of-t-he upward stroke o l' the travel '-'is Iimited by the plat-e Zlifithe cup "22 is filled with syrupa ndthe valve 38 closes "dueto th'e'aetion of gravity. In the event, however, that "this valve "should nuit close completely for some reason the initial downward movement-of the piston 25 at the start of the next stroke of =t'-he handle 28 :causes the valve '38 to immediately seal pos'tively against the "bottom of the-cup 22.

Throughout the foregoing description, m'ention has "been made of the ease with which the ever, for purposes of "clarity a cleaning procedure follows:

To cler-n the pump l0 the-attendant firstlii'ts jar ll allowing the excess-syrup to to the fully depressed moved away, and the spring together with the valve"38 and the valve. guide frnember '40 remain in thecup 72.

The attendant two parts of the arate washing. "Next,

then lifts the spring 44 and 1 the -valve38 out 'o'f'the cup *for sephe withdraws the =valve32 from the :end "of the "tube F6 and thoroughly cleans and washes "the valve following the procedure set forth abovel'in'connection with the= description ofthewailve. :The "cap 60-on' the upper end of the t1ibe"|6 isthen unscrewed and ithe plug BI is removed, the two being washed sep- When the pump l has been disassembled to this stage the parts remaining assembled are completely exposed and may be thoroughly washed without difliculty, a brush being run into the tube It from each end to clean it and the piston 25 being moved back and forth so that the lower end of the outside of the tube i6 below the plate and the rod 26 can be cleaned. If desired, the handle assembly It may be disassembled simply by unscrewing the various parts from the shaft 26.

After all the parts have reassembled and the pump lation on a clean syrup jar.

From the foregoing description it will be apparent that a novel and superior syrup pump has been developed. Various changes and modifications in the described embodiments such as will present themselves to those familiar with the art may be made without departing from the spirit of this invention whose scope is commensurate with the following claims.

What is claimed is:

1. A syrup pump comprising a cover plate adapted to be received on a syrup jar, a discharge tube passing through said cover plate to a point within the syrup jar, a second plate having a plurality of projections about been cleaned they are is ready for reinstalits circumference disposed near the lower end of said tube, a cylindrical cup having a plurality of bayonet slots therein adapted to receive the projections of said second plate, an opening in each of said plates, a rod extending through both openings, a piston on the lower end of said rod having a diameter substantially the same as the inside of said cup, an opening through said piston through which the discharge tube passes, an inlet valve including a valve member and a valve guide spider disposed in the bottom of the cup, means for manually moving said rod downwardly to actuate said piston, and a coil spring received within said cup between said valve guide spider and the piston for moving said piston upwardly.

2. A syrup pump comprising a discharge tube, a chamber at the lower end of said tube, means for exerting pressure on syrup in said chamber, a check valve assembly including a member received in the end of said tube, a movable ball disposed within said member, and a valve port in said member connecting the interior of said tube with said chamber, the member being of such length as to allow said ball to move at least twice the diameter of said tube away from said port, a discharge opening in the side of said tube near the opposite end thereof, and a removable pointed plug for closing the upper end of the tube, said plug extending downwardly to a point below the discharge opening so as to define a decreasing annular passage within the tube.

3. A syrup pump comprising a a chamber at the lower end of said tube, means for exerting pressure on syrup in said tube, a check valve assembly including a member removably received in able ball disposed within said member, and a valve port in said member connecting the interior of said tube with said chamber, the member being of such length as to allow said ball to move at least twice the diameter of said tube up said tube away from said port, a discharge opening in the side of said tube near the opposite end thereof, and a removable, plug for closing the upper end of said tube, the inner end of the plug being disposed below the discharge opening whereby drippings from the plug as the liquid level in the tube is lowered fall back down the tube.

4. A syrup pump comprising a discharge tube, a chamber at the lower end of said tube, means for exerting pressure on s rup in said tube, a ball check valve removably received in the lower end of said tube, a discharge opening in the side of said tube near the opposite end thereof, a removable plug for closing the upper end of said tube, and a threaded cap having an opening through the end thereof for holding the plug in place.

5. A discharge conduit for a syrup pump comprising a unitary tube having two substantially straight portions connected by a relatively sharp curved portion the curvature being such that light is visible from either end of the tube when the other end is open and disposed adjacent to a source of light, a readily removable plug having a conical inner end and sealing the upper end of said tube, a discharge opening in the side wall of the tube near the plug said conical inner end extending inwardly beyond said discharge opening, and a check valve removably received in the opposite end of the tube, said valve comprising a member closing the end of the tube and having a valve port therein, a pair of prongs extending upwardly into said tube having inwardly bent ends, and a ball retained between said prongs said ball coacting with said port to seal same and prevent the back flow of liquid out of said ube.

6. A discharge conduit for a syrup pump comprising a unitary tube having two substantially straight portions connected by a relatively slightly curving portion, a removable plug having a conical inner end and sealing the upper end of said tube, a discharge opening in the side wall of the tube near the plug, said plug extending inwardly beyond said discharge opening, and a check valve removably received in the lower end of the tube.

'1. A discharge conduit for a syrup pump comprising a unitary tube, a readily removable plug having a conical inner end and sealing the upper end of said tube, a discharge opening in the side wall of the tube near the plug, said plug extending inwardly beyond said discharge opening, and a check valve removably received in the lower end of the tube, said valve comprising a member closing the end of the tube and having a valve port therein. a pair of prongs on said member extending upwardly having inwardly bent ends, and a ball retained between said prongs, said ball coacting with said port to seal same and prevent the back flow of liquid out of said tube, and outward pressure of said prongs against the conduit being the sole means of supporting the valve in the tube.

8. A syrup pump comprising a discharge tube, a plate attached to the lower end of said tube. a cylindrical cup removably attached to said plate, a piston disposed within said cup and movable from a position adjacent the plate to a point near the bottom of the cup, a check valve in the bottom of said cup permitting syrup to flow into the cup, a second check valve in the discharge tube closing in the direction of flow down said tube, a discharge opening at the upper end of said tube on the side thereof, and a removable plug for sealing the end of the discharge tube, the end of said plug being pointed and extending to a point below said discharge opening.

9. A syrup pump comprising a discharge tube.

plug! for sealing: the: end: of the end of saidiplug being too a1 point; below said: discharge": opening;

IOaIn a device: of

in engagement.

11. In a. device of the class describedthevcombinati'on including a, circula plate having. anpluralityofprojectin'g lugs" spaced about itsperiphery; a. cup having substantially the same diammitting. fluid" to" fl'ow' into said" cup, at movably mounted pistonin said cup forii'orcing fluid; up out'of. said: oup, and'a' coil spring in said'i cup for the bayonet slots.

12. In a syrup pump the combination including a discharge tube extending to a point within having a plurality of proa remmtrlee valve? guide; and! a; coil; re? withim sa-idi cupr. beneath" saidi for urging: said piston v upwardly: and: maintaining; a downwardttensien said: cuptoholct the: bar:- onetjoint imengagement...

' 154:. Incombinatiomwitha pumpfor dispensing sodaiibuntaim syrupiand the lik'e ufirom' 3.5 enerally upright: openetoppedi syrup container, as delivery spout; renewing. syrup: from said: container by means otisaa'dipump said'delivwy"spout extending over:v a;silh=.eo;f. said can ainer andxhavingtatzleast 117$ outer end: portion sloping downwardly when said and pump vare in their normal dist pausing positions; the outer: end portion ofsaid delitemrspoutilia v'h :an outlet orifice? in theiun, dez'sidie thereof ati atspaced' distance from said outerendsofi saidispout'; and a closure for the end ofisaidi spam; blocking said spout above said orfclosure: providing an internal extension on smaller" diameten'th'an: the internal diameter .01 sflirtspuut, spaoedsfrom theswalls-oif said spout and extending downwardly therein over saidiori to as said: orifice so; that" said orifioeis' prevented from rip n inatiom with a pumpfor dispensing and: outlet: ports and adapted to be suspended within; all syru l container,- an outlet tube commum'uating: withzsaid' cylinder outlet port'- and ex- .upwardl y toza point above and outboard 01. said. container," the outer end portion of said outlet; tube. being: al-i gned' to slope downwardly w :saakfipmnp issin-ite nor-mal dispensing posiwithin; said-i containei=- and having" anoutlet prevented from 16. A syrup pump comprising a support adapted to be mounted a In a. syrup pump, the combination comprismg a cover plate adapted to be received on a syrup jar, a discharge tube carried by said cover plate, a second plate disposed near the lower end of said tube, an opening in each 01 said plates, a rod extending through both said openings, a piston on the lower end of said rod sliding upon said discharge tube and supported thereby against rotation, a cylindrical cup supported beneath said second plate having an internal diameter substantially the same as the piston, a head secured on the upper end of the rod, and means axially adjustable to various positions with respect to the rod for limiting travel of said piston including a stop member and a locking member threadably supported on the said rod below the head to cooperate with each other, one of said members telescoping with the cover plate in guided relationship, and the other of said members telescoping with said head when moveable independently thereof to jam lock said one member, an element upon one of said members cooperating with said cover plate to limit the downward movement of the rod.

18. A syrup pump comprising a support adapted to be monuted on a syrup receptacle, a discharge tube carried by said support and extending above and below the same, a circular plate near the lower end of the discharge tube, a hollow cup marginally engaging said plate, said plate and cup being so constructed and arranged at their engagement that the plate is attached to said cup with a releasable bayonet joint engagement, a moveable piston within said cup, a valve member in the bottom of the cup, a removeable guide for supporting and limiting upward movement of said valve member, a spring disposed beneath said piston and above said guide in said cup to urge maintenance of said bayonet joint engagement, and means including a handle and a rod extending downwardly through an opening in said plate to the piston for manually moving said piston downwardly in said cup, said movement being in the direction of compressing said spring.

19. A syrup pump comprising a, discharge tube extending to a point within a syrup jar, a plate disposed near the lower end 01 said tube, a cylindrical cup supported below said plate, a manually moveable rod extending through the opening in said plate, a piston on the lower end of said rod having a diameter substantially the same as the inside of said cup and having an opening through which the discharge tube passes, an inlet valve at the bottom of said cup including a moveable valve member and a removeable valve guide resting against the bottom of the cup for retaining said valve member against excessive upward movement, and a coil spring received within said cup under compression between said piston and valve guide, one end of the spring engaging said piston for urging said piston to its uppermost retracted position and the other end 0! the spring engaging the top of the valve guide for maintaining a downward force on said valve guide and cylindrical cup. MYRON E. S'I'ECZYNSKI.

WALTER W. BIEDERSTADT. EARL V. RUPP.

References Cited in the file of this patent UNITED STATES PATENTS 

